Re: __unused

[Johan Rydberg <jrydberg@night.trouble.net>]

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Hollis Blanchard <hollis@penguinppc.org> writes:

>>   int
>>   grub_foo (int x, unused int foo)
>>   {
>>     ...
>>   }
>
> I believe gcc attributes can't be used as naturally as this; it would
> have to be "int unused foo" or "int unused *foo" (from memory).

jrydberg@fauna:~/tmp/t5 $ gcc -Dunused= -Wall -Wunused-parameter -O2 -c t1.c
t1.c: In function 'foo':
t1.c:6: warning: unused parameter 'x'
t1.c:6: warning: unused parameter 'baz'
jrydberg@fauna:~/tmp/t5 $ gcc -Wall -Wunused-parameter -O2 -c t1.c
t1.c: In function 'foo':
t1.c:6: warning: unused parameter 'x'
jrydberg@fauna:~/tmp/t5 $ cat t1.c
#ifndef unused
# define unused __attribute__((unused))
#endif
int
foo (int x, unused int baz)
{
  return 0;
}

~j

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